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Old 16th December 2007, 09:48 PM   #1
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Default Happy Birthday to the Transistor!

60 years ago today, it was unveiled by Bell Labs!


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Old 16th December 2007, 09:59 PM   #2
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Default Re: Happy Birthday to the Transistor!

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Originally posted by salesmonster
60 years ago today, it was unveiled by Bell Labs!


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Thanks for the reminder.

One of the early mass uses of the Germanium transistor was in the Touch Tone telephone. The transistor was so expensive that they used a single transistor in the dual-tone keypad oscillator to generate both tones. A very interesting trick to make a one-transistor oscillator oscillate on two different, non-harmonically-related frequencies.

Cheers,
Bob
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Old 16th December 2007, 10:08 PM   #3
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Cool

My multimeter broke yesterday while testing a transistor

Late happy birthday !
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Old 16th December 2007, 10:32 PM   #4
KSTR is online now KSTR  Germany
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But let's not forget its older brother, the FET (IGFET invented in the late 20ies, JFET in 1945)
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Old 17th December 2007, 01:59 AM   #5
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AND.....IMO.....J-fet is still best for audio.......input.........
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Old 17th December 2007, 04:56 AM   #6
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Thanks are due again to Shockley (50%), Brattain and Bardeen (about 25% each). However, the device invented 60 years ago was the the point-contact transistor (no longer used anywhere), not the BJT (invented by Shockley alone a few years later, and which we'll still be using 50 years from now in high-quality audio amplifiers).

I wonder what these guys would think about some of the devices we take for granted today - with specs of 1KV+ Vce, current ratings of 10s of amps, beta above a 1000, etc.
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Old 17th December 2007, 05:18 AM   #7
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According to Wikipedia --

Julius Edgar Lilienfeld invented the FET transistor in 1925 but
no evidence that he actually built it, although some academics
showed a few years ago that it would have been possible using
the materials and tools he had back then.

Hey, he invented the electrolytic capacitor too. Lot of dedicated
people in the past have made modern electronics where it
is today.
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Old 17th December 2007, 09:41 AM   #8
Elvee is offline Elvee  Belgium
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History tends to remember the loudest ones; other slip quietly into oblivion:
http://www.ieee.org/portal/cms_docs_...VanDormael.pdf
LV
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Old 17th December 2007, 10:10 AM   #9
Nordic is offline Nordic  South Africa
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Happy birthday

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Old 17th December 2007, 10:23 AM   #10
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Actually, if you examine Prof J.E. Lilienfeld closer one might think that Mr Field of Lilies can be regarded as a very early audiophile.
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